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[PATCH OLK-6.6 v4 00/41] Support xfs atomic write of COW
by Long Li 08 Nov '25

08 Nov '25

The software solution supports XFS atomic write, but the hardware solution does not fully support it. v3->v4: 1. Fix issues of atomic write for aio. 2. Fix convert too much count fsb to writen for cow fork in xfs_atomic_write_cow_iomap_begin. Christoph Hellwig (1): xfs: cleanup xfs_vn_getattr Darrick J. Wong (7): xfs: add helpers to compute log item overhead xfs: add helpers to compute transaction reservation for finishing intent items xfs: separate out setting buftarg atomic writes limits xfs: ignore HW which cannot atomic write a single block xfs: allow sysadmins to specify a maximum atomic write limit at mount time xfs: fix delalloc write failures in software-provided atomic writes xfs: fix various problems in xfs_atomic_write_cow_iomap_begin John Garry (31): block: Pass blk_queue_get_max_sectors() a request pointer block: Generalize chunk_sectors support as boundary support block: Add core atomic write support block: Call blkdev_dio_unaligned() from blkdev_direct_IO() block: Add fops atomic write support block/fs: Pass an iocb to generic_atomic_write_valid() fs/block: Check for IOCB_DIRECT in generic_atomic_write_valid() block: Add bdev atomic write limits helpers fs: Export generic_atomic_write_valid() fs: iomap: Atomic write support xfs: Support atomic write for statx xfs: Validate atomic writes xfs: Support setting FMODE_CAN_ATOMIC_WRITE iomap: Minor code simplification in iomap_dio_bio_iter() iomap: Rename IOMAP_ATOMIC -> IOMAP_ATOMIC_HW iomap: Support SW-based atomic writes iomap: inline iomap_dio_bio_opflags() iomap: comment on atomic write checks in iomap_dio_bio_iter() iomap: rework IOMAP atomic flags fs: add atomic write unit max opt to statx xfs: rename xfs_inode_can_atomicwrite() -> xfs_inode_can_hw_atomic_write() xfs: allow block allocator to take an alignment hint xfs: refactor xfs_reflink_end_cow_extent() xfs: refine atomic write size check in xfs_file_write_iter() xfs: add xfs_atomic_write_cow_iomap_begin() xfs: add large atomic writes checks in xfs_direct_write_iomap_begin() xfs: commit CoW-based atomic writes atomically xfs: add xfs_file_dio_write_atomic() xfs: add xfs_calc_atomic_write_unit_max() xfs: update atomic write limits xfs: disallow atomic writes on DAX Prasad Singamsetty (2): fs: Initial atomic write support fs: Add initial atomic write support info to statx Documentation/ABI/stable/sysfs-block | 53 +++++ block/blk-core.c | 22 ++ block/blk-merge.c | 67 +++++- block/blk-mq.c | 2 +- block/blk-settings.c | 88 ++++++++ block/blk-sysfs.c | 33 +++ block/blk.h | 9 +- block/fops.c | 51 +++-- drivers/md/dm.c | 2 +- fs/aio.c | 8 +- fs/btrfs/ioctl.c | 2 +- fs/iomap/direct-io.c | 144 +++++++------ fs/iomap/trace.h | 3 +- fs/read_write.c | 22 +- fs/stat.c | 35 ++++ fs/xfs/libxfs/xfs_bmap.c | 5 + fs/xfs/libxfs/xfs_bmap.h | 6 +- fs/xfs/libxfs/xfs_log_rlimit.c | 3 + fs/xfs/libxfs/xfs_trans_resv.c | 291 +++++++++++++++++++++++++-- fs/xfs/libxfs/xfs_trans_resv.h | 21 ++ fs/xfs/xfs_bmap_item.c | 10 + fs/xfs/xfs_bmap_item.h | 3 + fs/xfs/xfs_buf.c | 37 +++- fs/xfs/xfs_buf.h | 6 +- fs/xfs/xfs_buf_item.c | 19 ++ fs/xfs/xfs_buf_item.h | 3 + fs/xfs/xfs_extfree_item.c | 10 + fs/xfs/xfs_extfree_item.h | 3 + fs/xfs/xfs_file.c | 87 +++++++- fs/xfs/xfs_inode.h | 22 ++ fs/xfs/xfs_iomap.c | 251 ++++++++++++++++++++++- fs/xfs/xfs_iomap.h | 1 + fs/xfs/xfs_iops.c | 102 +++++++++- fs/xfs/xfs_iops.h | 3 + fs/xfs/xfs_log_cil.c | 4 +- fs/xfs/xfs_log_priv.h | 13 ++ fs/xfs/xfs_mount.c | 126 ++++++++++++ fs/xfs/xfs_mount.h | 17 ++ fs/xfs/xfs_refcount_item.c | 10 + fs/xfs/xfs_refcount_item.h | 3 + fs/xfs/xfs_reflink.c | 146 +++++++++++--- fs/xfs/xfs_reflink.h | 5 + fs/xfs/xfs_rmap_item.c | 10 + fs/xfs/xfs_rmap_item.h | 3 + fs/xfs/xfs_super.c | 64 +++++- fs/xfs/xfs_trace.h | 108 ++++++++++ include/linux/blk_types.h | 8 +- include/linux/blkdev.h | 84 +++++++- include/linux/fs.h | 19 +- include/linux/iomap.h | 5 + include/linux/stat.h | 4 + include/uapi/linux/fs.h | 5 +- include/uapi/linux/stat.h | 13 +- io_uring/rw.c | 8 +- 54 files changed, 1894 insertions(+), 185 deletions(-) -- 2.39.2

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[openeuler:OLK-6.6 3124/3124] drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:5059:32: warning: 'nbl_update_fw_ops' defined but not used
by kernel test robot 08 Nov '25

08 Nov '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 66984acf4b16f28a2cc0d5d6186b4b6bbfd92e26 commit: c83cda743e4b3b6d71e36276bf3dc2b35dc64515 [3124/3124] net:nebula-matrix:fix compile err config: x86_64-randconfig-071-20251108 (https://download.01.org/0day-ci/archive/20251108/202511081113.jt4QTRG9-lkp@…) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251108/202511081113.jt4QTRG9-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202511081113.jt4QTRG9-lkp@intel.com/ All warnings (new ones prefixed by >>): drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c: In function 'nbl_serv_handle_tx_timeout': drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:1378:33: warning: variable 'vector' set but not used [-Wunused-but-set-variable] 1378 | struct nbl_serv_vector *vector; | ^~~~~~ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c: In function 'nbl_serv_remove_txrx_queues': drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:3025:35: warning: variable 'ring_mgt' set but not used [-Wunused-but-set-variable] 3025 | struct nbl_serv_ring_mgt *ring_mgt; | ^~~~~~~~ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c: In function 'nbl_serv_rep_start_xmit': drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:4002:29: warning: variable 'adapter' set but not used [-Wunused-but-set-variable] 4002 | struct nbl_adapter *adapter; | ^~~~~~~ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c: In function 'nbl_serv_set_wake': drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:4552:43: warning: variable 'net_resource_mgt' set but not used [-Wunused-but-set-variable] 4552 | struct nbl_serv_net_resource_mgt *net_resource_mgt; | ^~~~~~~~~~~~~~~~ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c: In function 'nbl_serv_load_p4': drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:5736:22: warning: variable 'name' set but not used [-Wunused-but-set-variable] 5736 | u8 *strtab, *name, *product_code = NULL; | ^~~~ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c: At top level: >> drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:5059:32: warning: 'nbl_update_fw_ops' defined but not used [-Wunused-const-variable=] 5059 | static const struct pldmfw_ops nbl_update_fw_ops = { | ^~~~~~~~~~~~~~~~~ -- drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_dev.c: In function 'nbl_dev_prepare_reset_task': drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_dev.c:902:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable] 902 | int ret; | ^~~ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_dev.c: In function 'nbl_dev_eswitch_load_rep': >> drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_dev.c:4598:54: warning: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size between 0 and 15 [-Wformat-truncation=] 4598 | snprintf(net_dev_name, IFNAMSIZ, "%s_%d", net_dev->netdev->name, i); | ^~ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_dev.c:4598:50: note: directive argument in the range [0, 2147483646] 4598 | snprintf(net_dev_name, IFNAMSIZ, "%s_%d", net_dev->netdev->name, i); | ^~~~~~~ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_dev.c:4598:17: note: 'snprintf' output between 3 and 27 bytes into a destination of size 16 4598 | snprintf(net_dev_name, IFNAMSIZ, "%s_%d", net_dev->netdev->name, i); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/nbl_update_fw_ops +5059 drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5058 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 @5059 static const struct pldmfw_ops nbl_update_fw_ops = { 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5060 .match_record = nbl_serv_pldmfw_op_pci_match_record, 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5061 .send_package_data = nbl_serv_send_package_data, 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5062 .send_component_table = nbl_serv_send_component_table, 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5063 .flash_component = nbl_serv_flash_component, 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5064 .finalize_update = nbl_serv_finalize_update, 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5065 }; 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5066 :::::: The code at line 5059 was first introduced by commit :::::: 468b0cd7b1e1c131b3ee7d2ea8b96521d3faad8b net:nebula-matrix:Add S1000 SNIC driver support :::::: TO: nebula_matrix_driver <open(a)nebula-matrix.com> :::::: CC: nebula_matrix_driver <open(a)nebula-matrix.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3124/3124] drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:5059:32: warning: unused variable 'nbl_update_fw_ops'
by kernel test robot 08 Nov '25

08 Nov '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 66984acf4b16f28a2cc0d5d6186b4b6bbfd92e26 commit: c83cda743e4b3b6d71e36276bf3dc2b35dc64515 [3124/3124] net:nebula-matrix:fix compile err config: x86_64-randconfig-072-20251108 (https://download.01.org/0day-ci/archive/20251108/202511081137.LDIGlbs7-lkp@…) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251108/202511081137.LDIGlbs7-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202511081137.LDIGlbs7-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:7: In file included from drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_ethtool.h:10: In file included from drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.h:10: In file included from include/linux/mm.h:2247: include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 508 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 509 | item]; | ~~~~ include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 515 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 516 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 527 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 528 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:536:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 536 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 537 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:1378:26: warning: variable 'vector' set but not used [-Wunused-but-set-variable] 1378 | struct nbl_serv_vector *vector; | ^ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:3025:28: warning: variable 'ring_mgt' set but not used [-Wunused-but-set-variable] 3025 | struct nbl_serv_ring_mgt *ring_mgt; | ^ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:4002:22: warning: variable 'adapter' set but not used [-Wunused-but-set-variable] 4002 | struct nbl_adapter *adapter; | ^ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:4552:36: warning: variable 'net_resource_mgt' set but not used [-Wunused-but-set-variable] 4552 | struct nbl_serv_net_resource_mgt *net_resource_mgt; | ^ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:5736:15: warning: variable 'name' set but not used [-Wunused-but-set-variable] 5736 | u8 *strtab, *name, *product_code = NULL; | ^ drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:5740:6: warning: variable 'p4_size' set but not used [-Wunused-but-set-variable] 5740 | u32 p4_size = 0; | ^ >> drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c:5059:32: warning: unused variable 'nbl_update_fw_ops' [-Wunused-const-variable] 5059 | static const struct pldmfw_ops nbl_update_fw_ops = { | ^~~~~~~~~~~~~~~~~ 12 warnings generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for ACPI_HOTPLUG_IGNORE_OSC Depends on [n]: ACPI [=y] && ACPI_HOTPLUG_CPU [=n] Selected by [y]: - X86 [=y] && ACPI [=y] && HOTPLUG_CPU [=y] vim +/nbl_update_fw_ops +5059 drivers/net/ethernet/nebula-matrix/nbl/nbl_core/nbl_service.c 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5058 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 @5059 static const struct pldmfw_ops nbl_update_fw_ops = { 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5060 .match_record = nbl_serv_pldmfw_op_pci_match_record, 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5061 .send_package_data = nbl_serv_send_package_data, 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5062 .send_component_table = nbl_serv_send_component_table, 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5063 .flash_component = nbl_serv_flash_component, 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5064 .finalize_update = nbl_serv_finalize_update, 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5065 }; 468b0cd7b1e1c1 nebula_matrix_driver 2025-09-24 5066 :::::: The code at line 5059 was first introduced by commit :::::: 468b0cd7b1e1c131b3ee7d2ea8b96521d3faad8b net:nebula-matrix:Add S1000 SNIC driver support :::::: TO: nebula_matrix_driver <open(a)nebula-matrix.com> :::::: CC: nebula_matrix_driver <open(a)nebula-matrix.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS 1930/1930] drivers/video/fbdev/core/sysfillrect.c:291:51: sparse: sparse: cast removes address space '<asn:2>' of expression
by kernel test robot 08 Nov '25

08 Nov '25

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 27e321784c005c852ca4b3a2d146547deac0698f commit: 7389066b79d5dc829e15de2509e43a66bf24e296 [1930/1930] fbdev: Fix out-of-bounds issue in sys_fillrect() config: arm64-randconfig-r134-20251105 (https://download.01.org/0day-ci/archive/20251108/202511080838.T6bw64D8-lkp@…) compiler: aarch64-linux-gcc (GCC) 14.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251108/202511080838.T6bw64D8-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202511080838.T6bw64D8-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> drivers/video/fbdev/core/sysfillrect.c:291:51: sparse: sparse: cast removes address space '<asn:2>' of expression drivers/video/fbdev/core/sysfillrect.c:329:32: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned long word @@ got restricted __le64 [usertype] @@ drivers/video/fbdev/core/sysfillrect.c:329:32: sparse: expected unsigned long word drivers/video/fbdev/core/sysfillrect.c:329:32: sparse: got restricted __le64 [usertype] drivers/video/fbdev/core/sysfillrect.c:329:32: sparse: sparse: cast to restricted __le64 vim +291 drivers/video/fbdev/core/sysfillrect.c 242 243 void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect) 244 { 245 unsigned long pat, pat2, fg; 246 unsigned long width = rect->width, height = rect->height; 247 int bits = BITS_PER_LONG, bytes = bits >> 3; 248 u32 bpp = p->var.bits_per_pixel; 249 unsigned long *dst; 250 int dst_idx, left; 251 long dst_offset; 252 253 if (p->state != FBINFO_STATE_RUNNING) 254 return; 255 256 if (p->fix.visual == FB_VISUAL_TRUECOLOR || 257 p->fix.visual == FB_VISUAL_DIRECTCOLOR ) 258 fg = ((u32 *) (p->pseudo_palette))[rect->color]; 259 else 260 fg = rect->color; 261 262 pat = pixel_to_pat( bpp, fg); 263 264 dst = (unsigned long *)((unsigned long)p->screen_base & ~(bytes-1)); 265 dst_idx = ((unsigned long)p->screen_base & (bytes - 1))*8; 266 dst_idx += rect->dy*p->fix.line_length*8+rect->dx*bpp; 267 /* FIXME For now we support 1-32 bpp only */ 268 left = bits % bpp; 269 if (p->fbops->fb_sync) 270 p->fbops->fb_sync(p); 271 if (!left) { 272 void (*fill_op32)(struct fb_info *p, unsigned long *dst, 273 int dst_idx, unsigned long pat, unsigned n, 274 int bits) = NULL; 275 276 switch (rect->rop) { 277 case ROP_XOR: 278 fill_op32 = bitfill_aligned_rev; 279 break; 280 case ROP_COPY: 281 fill_op32 = bitfill_aligned; 282 break; 283 default: 284 printk( KERN_ERR "cfb_fillrect(): unknown rop, " 285 "defaulting to ROP_COPY\n"); 286 fill_op32 = bitfill_aligned; 287 break; 288 } 289 while (height--) { 290 dst += dst_idx >> (ffs(bits) - 1); > 291 dst_offset = (long)dst - (long)p->screen_base; 292 if (dst_offset < 0 || dst_offset >= p->fix.smem_len) { 293 pr_err("dst offset out of bound: dst_offset(%ld)", dst_offset); 294 return; 295 } 296 dst_idx &= (bits - 1); 297 fill_op32(p, dst, dst_idx, pat, width*bpp, bits); 298 dst_idx += p->fix.line_length*8; 299 } 300 } else { 301 int right, r; 302 void (*fill_op)(struct fb_info *p, unsigned long *dst, 303 int dst_idx, unsigned long pat, int left, 304 int right, unsigned n, int bits) = NULL; 305 #ifdef __LITTLE_ENDIAN 306 right = left; 307 left = bpp - right; 308 #else 309 right = bpp - left; 310 #endif 311 switch (rect->rop) { 312 case ROP_XOR: 313 fill_op = bitfill_unaligned_rev; 314 break; 315 case ROP_COPY: 316 fill_op = bitfill_unaligned; 317 break; 318 default: 319 printk(KERN_ERR "sys_fillrect(): unknown rop, " 320 "defaulting to ROP_COPY\n"); 321 fill_op = bitfill_unaligned; 322 break; 323 } 324 while (height--) { 325 dst += dst_idx / bits; 326 dst_idx &= (bits - 1); 327 r = dst_idx % bpp; 328 /* rotate pattern to the correct start position */ 329 pat2 = le_long_to_cpu(rolx(cpu_to_le_long(pat), r, bpp)); 330 fill_op(p, dst, dst_idx, pat2, left, right, 331 width*bpp, bits); 332 dst_idx += p->fix.line_length*8; 333 } 334 } 335 } 336 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:OLK-6.6 3075/3075] drivers/ub/ubus/sysfs.c:395:5: warning: no previous prototype for function 'ub_create_sysfs_dev_files'
by kernel test robot 08 Nov '25

08 Nov '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 66984acf4b16f28a2cc0d5d6186b4b6bbfd92e26 commit: 9039065cf6d07af72879991553397629d8bd4e92 [3075/3075] ub:ubus: Adding a ue Creation Destruction Mechanism config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20251108/202511080120.CzSyQkhc-lkp@…) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251108/202511080120.CzSyQkhc-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202511080120.CzSyQkhc-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/ub/ubus/sysfs.c:395:5: warning: no previous prototype for function 'ub_create_sysfs_dev_files' [-Wmissing-prototypes] 395 | int ub_create_sysfs_dev_files(struct ub_entity *uent) | ^ drivers/ub/ubus/sysfs.c:395:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 395 | int ub_create_sysfs_dev_files(struct ub_entity *uent) | ^ | static >> drivers/ub/ubus/sysfs.c:406:6: warning: no previous prototype for function 'ub_remove_sysfs_ent_files' [-Wmissing-prototypes] 406 | void ub_remove_sysfs_ent_files(struct ub_entity *uent) | ^ drivers/ub/ubus/sysfs.c:406:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 406 | void ub_remove_sysfs_ent_files(struct ub_entity *uent) | ^ | static 2 warnings generated. vim +/ub_create_sysfs_dev_files +395 drivers/ub/ubus/sysfs.c 394 > 395 int ub_create_sysfs_dev_files(struct ub_entity *uent) 396 { 397 int retval; 398 399 retval = ub_create_capabilities_sysfs(uent); 400 if (retval) 401 return retval; 402 403 return 0; 404 } 405 > 406 void ub_remove_sysfs_ent_files(struct ub_entity *uent) -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[PATCH OLK-5.10] net/oenetcls: work around l0 cache
by Wang Liang 07 Nov '25

07 Nov '25

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/ID5HIM -------------------------------- L0 cache is not support by some platforms, work around it. Fixes: d60758b0ffcd ("net/oenetcls: introduce oenetcls for network optimization") Signed-off-by: Wang Liang <wangliang74(a)huawei.com> --- net/oenetcls/oenetcls_l0.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/oenetcls/oenetcls_l0.c b/net/oenetcls/oenetcls_l0.c index b820a1cf96bd..2a12734e53b3 100644 --- a/net/oenetcls/oenetcls_l0.c +++ b/net/oenetcls/oenetcls_l0.c @@ -147,6 +147,9 @@ void init_oecls_l0_cache(void) int ret = 0; struct l0_vma_data *sbkpages; + /* L0 cache is not support by some platforms, work around this */ + return; + oecls_l0_cache = kzalloc(sizeof(*oecls_l0_cache), GFP_KERNEL); if (!oecls_l0_cache) { oecls_error("kzalloc oecls_l0_cache fail!\n"); -- 2.34.1

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[openeuler:OLK-6.6 3075/3075] drivers/ub/ubus/interrupt.c:43:6: warning: no previous prototype for function 'ub_intr_init'
by kernel test robot 07 Nov '25

07 Nov '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: d92229e139bee35ce8e87e18db2e548549c94afd commit: 1faf759d302206a8387d685808928c228c9aa306 [3075/3075] ub:ubus: Add MSI capability for UBUS driver config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20251107/202511071322.Zrq7tHrZ-lkp@…) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251107/202511071322.Zrq7tHrZ-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202511071322.Zrq7tHrZ-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/ub/ubus/interrupt.c:43:6: warning: no previous prototype for function 'ub_intr_init' [-Wmissing-prototypes] 43 | void ub_intr_init(struct ub_entity *uent) | ^ drivers/ub/ubus/interrupt.c:43:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 43 | void ub_intr_init(struct ub_entity *uent) | ^ | static 1 warning generated. vim +/ub_intr_init +43 drivers/ub/ubus/interrupt.c 42 > 43 void ub_intr_init(struct ub_entity *uent) 44 { 45 if (uent->cfg1_bitmap[0] & UB_INT_TYPE2_CAP_BIT) 46 uent->intr_type1 = 0; 47 else if (uent->cfg1_bitmap[0] & UB_INT_TYPE1_CAP_BIT) 48 uent->intr_type1 = 1; 49 else 50 uent->no_intr = 1; 51 } 52 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[PATCH OLK-6.6] mm: do not install PMD mappings when handling a COW fault
by Jinjiang Tu 07 Nov '25

07 Nov '25

From: Zhang Yi <yi.zhang(a)huawei.com> maillist inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/ID5GEV Reference: https://lore.kernel.org/lkml/20251024102237.3332200-1-yi.zhang@huaweicloud.… ------------------------------------------- When pinning a page with FOLL_LONGTERM in a CoW VMA and a PMD-aligned (2MB on x86) large folio follow_page_mask() failed to obtain a valid anonymous page, resulting in an infinite loop issue. The specific triggering process is as follows: 1. User call mmap with a 2MB size in MAP_PRIVATE mode for a file that has a 2MB large folio installed in the page cache. addr = mmap(NULL, 2*1024*1024, PROT_READ, MAP_PRIVATE, file_fd, 0); 2. The kernel driver pass this mapped address to pin_user_pages_fast() in FOLL_LONGTERM mode. pin_user_pages_fast(addr, 512, FOLL_LONGTERM, pages); -> pin_user_pages_fast() | gup_fast_fallback() | __gup_longterm_locked() | __get_user_pages_locked() | __get_user_pages() | follow_page_mask() | follow_p4d_mask() | follow_pud_mask() | follow_pmd_mask() //pmd_leaf(pmdval) is true because the | //huge PMD is installed. This is normal | //in the first round, but it shouldn't | //happen in the second round. | follow_huge_pmd() //require an anonymous page | return -EMLINK; | faultin_page() | handle_mm_fault() | wp_huge_pmd() //remove PMD and fall back to PTE | handle_pte_fault() | do_pte_missing() | do_fault() | do_read_fault() //FAULT_FLAG_WRITE is not set | finish_fault() | do_set_pmd() //install a huge PMD again, this is wrong!!! | do_wp_page() //create private anonymous pages <- goto retry; Due to an incorrectly large PMD set in do_read_fault(), follow_pmd_mask() always returns -EMLINK, causing an infinite loop. David pointed out that we can preallocate a page table and remap the PMD to be mapped by a PTE table in wp_huge_pmd() in the future. But now we can avoid this issue by not installing PMD mappings when handling a COW and unshare fault in do_set_pmd(). Fixes: a7f226604170 ("mm/gup: trigger FAULT_FLAG_UNSHARE when R/O-pinning a possibly shared anonymous page") Reported-by: Karol Wachowski <karol.wachowski(a)linux.intel.com> Closes: https://lore.kernel.org/linux-ext4/844e5cd4-462e-4b88-b3b5-816465a3b7e3@lin… Suggested-by: David Hildenbrand <david(a)redhat.com> Signed-off-by: Zhang Yi <yi.zhang(a)huawei.com> Acked-by: David Hildenbrand <david(a)redhat.com> Signed-off-by: Jinjiang Tu <tujinjiang(a)huawei.com> --- mm/memory.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/mm/memory.c b/mm/memory.c index 4bb3acfc3dd9..ead7b4eb2e40 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4922,6 +4922,11 @@ vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page) if (!thp_vma_suitable_order(vma, haddr, PMD_ORDER)) return ret; + /* We're about to trigger CoW, so never map it through a PMD. */ + if (is_cow_mapping(vma->vm_flags) && + (vmf->flags & (FAULT_FLAG_WRITE|FAULT_FLAG_UNSHARE))) + return ret; + if (folio_order(folio) != HPAGE_PMD_ORDER) return ret; page = &folio->page; -- 2.43.0

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[openeuler:OLK-6.6 3075/3075] drivers/irqchip/irq-gic-v3-its-ub-msi.c:149:12: warning: no previous prototype for function 'its_ub_msi_init'
by kernel test robot 07 Nov '25

07 Nov '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 5fbff312766cccbe69b33ef625e720c49e8cc866 commit: 81962d0ecc6e3e039f4df445d38650dd6109bc78 [3075/3075] ub:ubus: Support UBUS Interrupt framework config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20251107/202511070221.5BlpE2PF-lkp@…) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251107/202511070221.5BlpE2PF-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202511070221.5BlpE2PF-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/irqchip/irq-gic-v3-its-ub-msi.c:149:12: warning: no previous prototype for function 'its_ub_msi_init' [-Wmissing-prototypes] 149 | int __init its_ub_msi_init(void) | ^ drivers/irqchip/irq-gic-v3-its-ub-msi.c:149:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 149 | int __init its_ub_msi_init(void) | ^ | static 1 warning generated. vim +/its_ub_msi_init +149 drivers/irqchip/irq-gic-v3-its-ub-msi.c 148 > 149 int __init its_ub_msi_init(void) -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[PATCH OLK-6.6 v4 00/10] Add xcall 2.0 support
by Jinjie Ruan 06 Nov '25

06 Nov '25

Add xcall 2.0 support, which is compatible with xcall1.0, and can be used to dynamic instruction replacement for hardware xcall. Compilation works normally under the switch hardware xcall and xcall2.0. And hardware xcall tested normally using xcall 2.0 or dynamic library method. Changes in v4: - Reuse uprobe_write_opcode() instead of use __replace_page() and copy_to_page(). - Handle error for uprobe_write_opcode(). - Support xcall1.0 before 920G. - Change xcall1.0 bitmap to byte array to save check insns. - Use percpu variable to save check insns for xcall1.0. - A little cleanup. Changes in v3: - Add validity checks during xcall registration to prevent out-of-bounds access and null pointer dereferences. - Extract __replace_page() and copy_to_page() from uprobe, to avoid code duplication. - Replace with new compatible refactored code. - Remove unnecessary member, such as old_name. Changes in v2: - Remove duplicates or unnecessary ~300 LOC, such as link_slot, init_task. - Fix kabi. - Some cleanups. Jinjie Ruan (1): xcall2.0: Support xcall1.0 for hardware xcall Liao Chang (8): xcall2.0: Add userspace proc interface xcall2.0: Add xcall module register interface xcall2.0: Add xcall_area xcall2.0: Hajack syscall with dynamic instruciton replace xcall: Refactor the early exception entry for ACTLR.xcall arm64: Revert the hack to the early entry of SYNC exception xcall: Refactor the early entry for SYNC exception xcall2.0: Add a basic testcase Yuntao Liu (1): xcall2.0: Intruduce xcall2.0 prefetch kernel module arch/arm64/Kconfig.turbo | 13 + arch/arm64/include/asm/exception.h | 4 +- arch/arm64/include/asm/mmu_context.h | 7 - arch/arm64/include/asm/xcall.h | 142 ++++---- arch/arm64/kernel/cpufeature.c | 71 ++-- arch/arm64/kernel/entry-common.c | 65 +++- arch/arm64/kernel/entry.S | 86 +---- arch/arm64/kernel/probes/uprobes.c | 6 + arch/arm64/kernel/process.c | 5 + arch/arm64/kernel/syscall.c | 14 + arch/arm64/kernel/xcall/Makefile | 3 +- arch/arm64/kernel/xcall/core.c | 396 +++++++++++++++++++++ arch/arm64/kernel/xcall/entry.S | 185 ++++++++-- arch/arm64/kernel/xcall/proc.c | 204 +++++++++++ arch/arm64/kernel/xcall/xcall.c | 56 +-- arch/arm64/kvm/sys_regs.c | 1 + drivers/staging/Kconfig | 2 + drivers/staging/Makefile | 1 + drivers/staging/xcall/Kconfig | 19 + drivers/staging/xcall/Makefile | 1 + drivers/staging/xcall/dynamic_xcall_test.c | 97 +++++ drivers/staging/xcall/prefetch.c | 270 ++++++++++++++ fs/proc/proc_xcall.c | 141 ++------ include/linux/mm_types.h | 4 + include/linux/xcall.h | 52 +++ kernel/events/uprobes.c | 19 + kernel/fork.c | 2 + mm/mmap.c | 14 +- 28 files changed, 1512 insertions(+), 368 deletions(-) create mode 100644 arch/arm64/kernel/xcall/core.c create mode 100644 arch/arm64/kernel/xcall/proc.c create mode 100644 drivers/staging/xcall/Kconfig create mode 100644 drivers/staging/xcall/Makefile create mode 100644 drivers/staging/xcall/dynamic_xcall_test.c create mode 100644 drivers/staging/xcall/prefetch.c create mode 100644 include/linux/xcall.h -- 2.34.1

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